Third to slatmaker



, (ModeL) I y W. P. TROAST.

PADLOUK.

No. 467,528. Patented Jan. 26, 1892.

UNITED STATES PATENT OFFICE.

lVILLIAM F. TROAST, OF LANCASTER, PENNSYLVANIA, ASSIGNOR OF ONE- THIRDTO SLAYMAKER, BARRY & OO., OF SAME PLACE.

PAD LOCK.

SPECIFICATION forming part of Letters Patent No. 467,528, dated January26, 1892. Application filed May 1, 1890. Serial No. 350,247. (Model) Toall whom it may concern.-

3e it known that I, WILLIAM F. TROAST, a citizen of the United States,residing at Lancaster, in the county of Lancaster and State ofPennsylvania, have invented certain Improvements in Padlocks, of whichthe following is a specification.

My invention relates to improvements in that class of padlocks in whicha U-shaped hasp or shackle with notches cut in both arms thereof is heldin place in the case by mechanism actuated to engage said notches; andit consists in the construction and combination of the various parts, ashereinafter fully described and claimed, and as illustrated in theaccompanying drawings, which form a part of this specification, in whichFigure 1 is a side elevation of the lock-case, the closing-plate andoperating mechanism being removed to show the parts formed integral withthe case. Fig. 2 is a perspective view of the spring-tumblers. Fig. 3 isa side elevation of the lock, the closing-plate being removed and thekey in place preparatory to disengaging the tumblers from the shackle;and Fig. 4 a similar view, but showing the key holding the tumblersdisengaged from the shackle. Fig. 5 is a transverse vertical section 011the line :0 00, Fig. 3; and Fig. 6, a similar view on the liney y, Fig.4, the closing-plate being shown in position in both Figs. 5 and 6. Fig.7 is a horizontal section on the line 2 a, Fig. 3, the closing-platebeing secured in position on the case; and Fig. 8, a similar section onthe line 2 2. Fig. 9 is a side view of the key. Fig. 10 is a side viewof the shackle shown detached from the case.

Fig. ll is a sectional view on the line at on,

Fig. 12 is an end view of the lockthe key-guide there project outwardlyand longitudinally of the lock parallel flanges 1), adapted to receivethe key 0 between them and having a channel I) cut transversely thereofto' admit the cross-bar of one of the tumblers, and a depression 11 intheir edges below and adjacent to said channel to receive the othertumbler when it is in engagement with the shackle. The surface of thekeyguide between the flanges b is concave in cross-section, and has arib c of similar shape extending across it on each side of the channelZ). One end of each of these ribs is adapted to engage correspondingwards c in the key 0 as it is turned in the lock. The other half of theribs is enlarged so as to be wider than said wards, and these enlargedportions form shoulders at in the center of the ribs which serve asstops to limit the rotation of the key in the case.

The tumblers are two in number, one D being shorter than the other E,and they, with the plate F connecting them, are formed from a singlepiece of spring metal, the tumblers having openings f cut through themin the center, as shown in Fig. 2. The plate F has perforations f in itat the ends to permit the arms 9 g of the shackle G to pass through itand between the tumblers D and E, the metal forming the outer portionsof the peripheries of the perforations being cut away to and through theends of the plate F. In the edges of the tumblers, just below the plateF, are formed recesses f. Near the top plate a and in the angle made bythe sides a and the back A there are formed lugs e, adapted to engagethe recesses f in the tumbler D.

H represents the closing-plate, and is provided with lugs h on its innerface near the four corners similar to the lugs e, the lugs h at theupper end of the plate H engaging the recesses fin the tumbler E. Theouter faces of the lugs 71 are flat and fit snugly up against the sideplates a, and are secured thereto by rivets or screws h to fasten theclosing-plate to the case. On and to one side of the inner face of theclosing-plate there is located a guide-rib 7L2, which passes through theopening f in the tumbler E, and serves with the flange b of thekey-guide B to hold the key in its proper position as it is introducedinto the lock. The connecting-plate F hasa centrally-located opening 4to permit the heelc of the key to pass through it, and the inner face ofthe top plate a is provided with a rea circular opening equal indiameter to the length of the ward 7c. Normally the slot in theguard-plate registers with the ward 70, so as to permit the passage ofthe key into the lock; but it turns with the key when it disengages thetumblers from the notches g of shackle, the longer arm of which isprovided with the usual cross-head g to prevent the separation of thecase and shackle.

When the parts of the lock are united, the

shorter tumbler D rests therein adjacent to the back A and the longerarm E adjacent to the closing-plate H. The recesses f of the tumblersengage the lugs c of the back and the upper lugs h of the closing-plate,and the cross-bars e d of the tumblers engage the two lowest notches gon opposite sides of the shackle-arms g g, the tumblers acting to closetoward each other and the arms of the shackle being between them. Thekey is inserted edgewise through the key-guide B and between said guideand the guide-rib 7L2 on the closing-plate, the heel c passing throughthe opening 1* in the connecting-plate F and engaging the recess 7" inthe top of the case, whereby it is steadied in its movement as it isrotated in the lock. As the key is turned to disengage the tumblers fromthe arms of the shackle the wards c engage the narrow portion of theribs 0 of the key-guide B, and the movement is continued through aquarter of an entire revolution, when it is stopped by the shoulders (Z,the shoulders c of the wards at the same time disengaging the tumblersfrom the notches in the arms of the shackle.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is

1. In a padlock, the combination, with the case having lugs, as 6,formed on the back plate, of a closing-plate provided with similar lugs,as h, projecting from the face thereof, and tumblers formed from asingle piece of spring metal and having recesses therein, as f, adaptedto engage the said lugs of the case and closing-plate, substantially asand for the purpose specified.

2. In a padlock, the combination, with the case, of a key-guide formedtherein having parallel flanges, and ribs extending between said flangesadapted to be engaged by wards of the key, substantially as specified.

3. In a padlock, the combination, with the case, of a key-guide formedtherein having flanges, ribs extending between said flanges adapted tobe engaged by Wards of the key, and shoulders formed on said ribs,substantially as and for the purpose specified.

4. In a padlock, the combination, with the case, of a key-guide formedtherein having flanges, and ribs extending between said flanges adaptedto be engaged by wards of the key,the said key-guide having a channelcuttransversely thereof to receive the crossbar of one of the tumblersand a depression in the flanges to receive the cross-bar of the othertumbler, substantially as and for the purpose specified.

5. In a padlock, the combination, with the case, of a key-guide formedtherein having flanges, ribs extending between said flanges adapted tobe engaged by wards of the key, and tumblers formed of a single piece ofspring metal and having recesses in the upper edges thereof constructedto engage lugs projecting from the back of the case and the.

face of the closing-plate, substantially as and for the purposespecified.

WILLIAM F. TROAST. WVitnesses:

J AOOB HALBAOH, WM. R. GORHART.

